Immature beetles (grubs) are less than 2.0 mm (1/16 inch) long on hatching and grow to about 5.0 mm (3/16 inch) when mature. They are typical C-shaped grubs with a yellow-brown head capsule and three pairs of legs.
The adult beetles frequent piles of grass clippings, leaves or any other decaying vegetation. They over-winter in wooded areas under litter on well-drained, sandy soil. Eggs can be laid on lush, moist fairways. Larvae hatch quickly and feed on bentgrass and bluegrass roots, clipping them off and consuming them – until the end of July.
The decision to control must be made early – before damage can be seen (use a golf course cup changer to monitor these root-feeding grubs).
• Grass blades wither and die in irregular patches.
• Turf can be easily pulled loose from the soil.
• The turf yellows in mid-July as if due to drought.
• Dead patches increase in size until the larvae cease feeding.
• Apply MERIT 0.5G or SOLUPAK just prior to egg hatch.
• Apply MERIT 0.5G at the rate of 560 g/100 m2.
• Apply MERIT SOLUPAK at the rate of 1 packet per 1,206 m2.
• Water sufficiently (5-10 mm of water) following the application to move the active ingredient through the thatch.
Aug8WedAugust 8, 2018
Brian Rosenberg has been named the new Head of Bayer Environmental Science Canada effective August 1, 2018.
May15TueMay 15, 2018
May11FriMay 11, 2018
The premier educational and networking event for golf course superintendents will accept 50 elite members for its 2018 class
May10ThuMay 10, 2018
Bayer is pleased to announce the appointment of Jon Albert as Territory Sales Manager Technical for the Canadian Golf Market. Jon will be responsible for providing technical information and support to golf courses in Eastern Ontario and the province of Quebec.